Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2ba093a920cf59…

MALICIOUS

PDF

44.9 KB Created: 2020-08-10 19:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87a942d9e86ac5a2d75d07308ae900da SHA-1: 1820c5eb57305319895e7eb5588b144ec5582ac3 SHA-256: 0c2ba093a920cf59dd5c8c824d3c5332d5765e8aa40d1674ee910e99da294cac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=list+of+architects+in+chennai+with+contact+details+pdf'. This indicates the document is designed to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=list+of+architects+in+chennai+with+contact+details+pdf
    • http://files.pghcru.org/uploads/1/3/1/4/131437822/50e36f230504ebb.pdf
    • http://files.gethsemanedavenport.org/uploads/1/3/1/3/131383247/dunifik.pdf
    • http://files.brooksidevt.net/uploads/1/3/0/9/130969572/gelezu_givazaguxiv_fubodisiles_jedemisozi.pdf
    • http://tulupel.giantrvsales.com/uploads/1/3/2/3/132303382/dfa6f08b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/torunadudilomomoxemor.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/14996877014.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3644/files/96270395777.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/taxipugolejukob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/58747238935.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/30278363275.pdf
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/sims_4_repack.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/livros_sobre_o_candombl.pdf
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/fuzulanopazezora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42386580717.pdf
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/86615410274.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006382.bin
481d90cf31c336937ff1431c3e70136da7ae9f041821a1345a3164ec1467aaf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 5064 bytes
font_01_sfnt_off000074bb.bin
0b4d7094dab266503544cb43c9b9b2e484cf298d4c8e4df9fa51975e10bd41dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BB 10692 bytes
font_02_sfnt_off00009870.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9870 4324 bytes

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